The relation between lattice parameters and very low twinning stress in Ni50Mn25+x Ga25-x magnetic shape memory alloys

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F16%3A00467366" target="_blank" >RIV/68378271:_____/16:00467366 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61388998:_____/16:00467366 RIV/68407700:21340/16:00311340

Výsledek na webu

<a href="http://dx.doi.org/10.1088/0964-1726/25/2/025001" target="_blank" >http://dx.doi.org/10.1088/0964-1726/25/2/025001</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/0964-1726/25/2/025001" target="_blank" >10.1088/0964-1726/25/2/025001</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The relation between lattice parameters and very low twinning stress in Ni50Mn25+x Ga25-x magnetic shape memory alloys

Popis výsledku v původním jazyce

In search for the origins of the extraordinary low twinning stress of Ni-Mn-Ga 10M martensite, we studied the temperature induced changes in lattice parameters of Ni 50 Mn 25+x Ga 25x (x = 2.7–3.9) single crystal samples and compared them with twinning stress dependences. The alloys exhibited transformation to five-layered (10M) martensite structure (cubic to monoclinic) between 297 to 328 K and exhibited magnetic shape memory effect in martensite. The structural changes were monitored using X-ray diffraction in the temperature range 200–343 K. The 10M structure was approximated by monoclinic lattice, a = b > c, γ > 90 with the coordinates derived from the cubic unit cell of the parent L2 1 phase. The lattice parameters γ and c/a correlate well with the universal linear increase of twinning stress of Type 1 twins with decreasing temperature. On the contrary, the twinning stress is not affected by differences between a and b.

Název v anglickém jazyce

The relation between lattice parameters and very low twinning stress in Ni50Mn25+x Ga25-x magnetic shape memory alloys

Popis výsledku anglicky

In search for the origins of the extraordinary low twinning stress of Ni-Mn-Ga 10M martensite, we studied the temperature induced changes in lattice parameters of Ni 50 Mn 25+x Ga 25x (x = 2.7–3.9) single crystal samples and compared them with twinning stress dependences. The alloys exhibited transformation to five-layered (10M) martensite structure (cubic to monoclinic) between 297 to 328 K and exhibited magnetic shape memory effect in martensite. The structural changes were monitored using X-ray diffraction in the temperature range 200–343 K. The 10M structure was approximated by monoclinic lattice, a = b > c, γ > 90 with the coordinates derived from the cubic unit cell of the parent L2 1 phase. The lattice parameters γ and c/a correlate well with the universal linear increase of twinning stress of Type 1 twins with decreasing temperature. On the contrary, the twinning stress is not affected by differences between a and b.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

—

Projekt

<a href="/cs/project/GB14-36566G" target="_blank" >GB14-36566G: Multidisciplinární výzkumné centrum moderních materiálů</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Smart Materials & Structures

ISSN

0964-1726

e-ISSN

—

Svazek periodika

25

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

6

Strana od-do

—

Kód UT WoS článku

000368814100003

EID výsledku v databázi Scopus

2-s2.0-84956692053